Progressive lens

Details Progressive lens Progressive lens

1992-08-18

1997-11-18

Vargot, Mathieu D.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

264 138, 264 25, 425810, B29D 1100

Patent

active

056893248

ABSTRACT:
A progressive lens mold, a method of making a progressive lens mold, and progressive lenses made using such mold or method. Back faces of progressive molds are preferentially tapered at their edges to reduce prism effects in lenses made using such molds. The tapering is accomplished by removing more of the back face adjacent the near portion vision zone of the mold versus the back face adjacent to the far vision zone of the molds.

REFERENCES:
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patent: 4676610 (1987-06-01), Barkan et al.
patent: 4728469 (1988-03-01), Danner et al.
patent: 4879318 (1989-11-01), Lipscomb et al.
patent: 4919850 (1990-04-01), Blum et al.
patent: 5210553 (1993-05-01), Barth et al.
patent: 5270744 (1993-12-01), Portney
patent: 5270745 (1993-12-01), Pedrono
patent: 5406341 (1995-04-01), Blum et al.
patent: 5455642 (1995-10-01), Kato
PCT Search Report mailed Dec. 22, 1993.

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